[BangPypers] Sphinx inheritance-diagram Issue

[Saju M]

I created complete API documentation using sphinx.
Command i used are:
$ sphinx-apidoc -f -F -o . /home/sam/CMS
$ make html

Then i planned to add inheritance-diagram of classes, for that i
edited "provider.rst" file and added two new lines as shown below.

provider diagram
----------------
.. inheritance-diagram:: CMS.cloud.DbModel.CloudProvider


Then i did "$ make html" again, after that i could see the new heading
"provider diagram", but could not see any diagram.
I did not get any errors.


Note:
=====
* Here CloudProvider is a module.



############ provider.rst fiel############

DbModel Package
===============

:mod:`CPTypes` Module
---------------------

.. automodule:: CMS.cloud.DbModel.CPTypes
    :members:
    :undoc-members:
    :show-inheritance:

:mod:`CloudProvider` Module
---------------------------

.. automodule:: CMS.cloud.DbModel.CloudProvider
    :members:
    :undoc-members:
    :show-inheritance:

provider diagram
----------------

.. inheritance-diagram:: CMS.cloud.DbModel.CloudProvider


:mod:`Network` Module
---------------------

.. automodule:: CMS.cloud.DbModel.Network
    :members:
    :undoc-members:
    :show-inheritance: